Gout Flashcards
drugs that inc uric acid levels
thiazide loop b blocker niacin low dose ASA pyrazinamide ethambutol cyclosrone tacrolimus levodopa ethanol fructose cytotoxic agents
acute tx gout (3)
dec inflammation:
NSAIDs
colchicine
glucocorticoids
first line for acute gout
NSAIDs
most popular for acute gout
indomethacin
what is contraindicated with indomethacin
ASA
cochicine AE
diarrhea - so bad that NSAIDs have replaced it
myopathy, neutropenia, aplastic anemia, alopecia
contraindicated in pregnancy, hepatic/renal/CV disease
chronic gout tx
lower urate concentration
1) decrease uric acid syntehsis
2) enhance uric acid excretion
3) enhance uric acid metabolism
allopurinol
decrease uric acid synthesis - inhib xanthine oxidase
febuxostat
decrease uric acid synthesis
same AE as allopurinol and drug interations with azathioprine and 6-mercaptopurine
probenecid
enhance uric acid excretion
pegloticase
enhance uric acid metabolism
first line for chronic gout
allopurinol
what drug can cause steven johnson syndrome
allopurinol
what happens if allopurinol is given alone
inc incidence of acute gout attacks
must give with NSAID or colchicine for the first few months
which gout tx can cause renal stones
probenecid
must drink lots of water, and keep urine alkaline (via sodium bicarb or K+citrate)
which pt should avoid probenecid
pt who overproduce uric acid or with nephrolithiasis
what drug is simialr to losartan and fenofibrate?
probencid - all inhibit URAT1
colchicine MOA
1) binds tubulin - inhibits polymerization = prevents microtubule formation - blocked cell division
2) disrupted motility of granulocytes to affected area
3) Inhibition of leukotriene synthesis/release
allopurinol contraindications
mercaptopurine
azathioprine
= purine analogs metabolized by xanthine oxidase. if given with allopurinol = toxic levels of mercaptopurine and azathioprine accumulate
probenecid MOA
URAT1 inhibitor = block uric acid reabsorption
pegloticase MOA
recombinant form of uricase: oxidizes uric acid to allantoin (soluble and easily excreted from kidney)
drug used in pt refractory to tx with xanthine oxidase inhibitors
pegloticase